Add initial Danger setup with Dangermattic

.buildkite/commands/danger-pr-check.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -eu
+
+export DANGER_GITHUB_API_TOKEN=${GITHUB_TOKEN}
+
+echo "--- :rubygems: Setting up Gems"
+bundle install
+
+echo "--- Running Danger: PR Check"
+bundle exec danger --fail-on-errors=true --dangerfile=.buildkite/danger/Dangerfile --remove-previous-comments --danger_id=pr-check

.buildkite/danger/Dangerfile

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+return if github.pr_labels.include?('Releases')
+
+manifest_pr_checker.check_gemfile_lock_updated
+labels_checker.check(
+  required_labels: [//],
+  required_labels_error: 'PR is missing at least one label.'
+)
+view_changes_need_screenshots.view_changes_need_screenshots
+pr_size_checker.check_diff_size
+android_unit_test_checker.check_missing_tests
+milestone_checker.check_milestone_due_date(days_before_due: 2)
+
+github.dismiss_out_of_range_messages
+rubocop.lint inline_comment: true, fail_on_inline_comment: true, include_cop_names: true
+
+warn "No reviewers have been set for this PR yet. Please request a review from **@\u2028Automattic/pocket-casts-android**." unless github.pr_json['assignee']

.buildkite/pipeline.yml

@@ -16,6 +16,28 @@ steps:
   # Wait for Gradle Wrapper to be validated before running any other jobs
   - wait
 
+  - group: "Linters"
+    steps:
+      - label: "☢️ Danger - PR Check"
+        command: .buildkite/commands/danger-pr-check.sh
+        plugins:
+          - docker#v5.8.0:
+              image: "public.ecr.aws/docker/library/ruby:3.2.2"
+              propagate-environment: true
+              environment:
+                - "GITHUB_TOKEN"
+        if: "build.pull_request.id != null"
+        agents:
+          queue: "default"
+
+      - label: 'Lint'
+        command: |
+          echo "--- 🧹 Linting"
+          ./gradlew lintDebug
+        plugins: *common_plugins
+        artifact_paths:
+          - "**/build/reports/lint-results*.*"
+
   - label: 'Unit tests'
     command: |
       echo "--- 🧪 Testing"
@@ -28,14 +50,6 @@ steps:
       ./gradlew spotlessCheck
     plugins: *common_plugins
 
-  - label: 'Lint'
-    command: |
-      echo "--- 🧹 Linting"
-      ./gradlew lintDebug
-    plugins: *common_plugins
-    artifact_paths:
-      - "**/build/reports/lint-results*.*"
-
   - label: "Instrumented tests"
     command: |
       echo "--- :rubygems: Setting up Gems"

.rubocop.yml

@@ -0,0 +1,31 @@
+inherit_mode:
+  merge:
+    - Include
+
+AllCops:
+  Exclude:
+    - vendor/**/*
+  Include:
+    - .buildkite/danger/**/*
+  NewCops: enable
+
+Layout/LineLength:
+  Max: 180
+  Exclude:
+    - fastlane/Fastfile
+    - scripts/themes/generate_themes.rb
+
+Metrics/BlockLength:
+  Exclude:
+    - fastlane/Fastfile
+    - scripts/themes/generate_themes.rb
+
+Metrics/MethodLength:
+  Max: 30
+  Exclude:
+    - fastlane/Fastfile
+    - scripts/themes/generate_themes.rb
+
+Naming/FileName:
+  Exclude:
+    - .buildkite/danger/Dangerfile

.ruby-version

@@ -1 +1 @@
-2.7.4
+3.2.2

Gemfile

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
-source "https://rubygems.org"
+source 'https://rubygems.org'
+
+gem 'danger-dangermattic', git: 'https://github.com/Automattic/dangermattic'
 gem 'fastlane', '~> 2'
 gem 'fastlane-plugin-wpmreleasetoolkit', '~> 9.0'